mirror of
https://github.com/Rockbox/rockbox.git
synced 2025-12-08 12:45:26 -05:00
e7718a711f
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@20028 a1c6a512-1295-4272-9138-f99709370657
248 lines
6.7 KiB
C
248 lines
6.7 KiB
C
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (C) 2008 by Thomas Martitz
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* Copyright (C) 2008 by Dominik Wenger
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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/* Basic button driver for the Fuze
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*
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* TODO: - Get the wheel working with interrupts
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* - find that Home button
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*/
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#include "system.h"
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#include "button.h"
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#include "button-target.h"
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#include "backlight.h"
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#define WHEEL_REPEAT_INTERVAL 30
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#define WHEELCLICKS_PER_ROTATION 48 /* wheelclicks per full rotation */
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#ifndef BOOTLOADER
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/* Buttons */
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static bool hold_button = false;
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static bool hold_button_old = false;
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#else
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#define hold_button false
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#endif /* !BOOTLOADER */
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static short _dbop_din = BUTTON_NONE;
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extern void lcd_button_support(void);
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void button_init_device(void)
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{
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}
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/* clickwheel */
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#if !defined(BOOTLOADER) && defined(HAVE_SCROLLWHEEL)
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static void clickwheel(void)
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{
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static unsigned int old_wheel_value = 0;
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static unsigned int wheel_value = 0;
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static unsigned int wheel_repeat = BUTTON_NONE;
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/* getting BUTTON_REPEAT works like this: We increment repeat by 2 if the
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* wheel was turned, and decrement it by 1 each tick,
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* that means: if you change the wheel fast enough, repeat will be >1 and
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* we send BUTTON_REPEAT
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*/
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static int repeat;
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/* we omit 3 of 4 posts to the button_queue, that works better, so count */
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static int counter = 0;
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/* Read wheel
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* Bits 13 and 14 of DBOP_DIN change as follows:
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* Clockwise rotation 00 -> 01 -> 11 -> 10 -> 00
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* Counter-clockwise 00 -> 10 -> 11 -> 01 -> 00
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*/
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static const unsigned char wheel_tbl[2][4] =
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{
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{ 2, 0, 3, 1 }, /* Clockwise rotation */
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{ 1, 3, 0, 2 }, /* Counter-clockwise */
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};
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wheel_value = _dbop_din & (1<<13|1<<14);
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wheel_value >>= 13;
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/* did the wheel value change? */
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if (!hold_button)
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{
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unsigned int btn = BUTTON_NONE;
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if (old_wheel_value == wheel_tbl[0][wheel_value])
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btn = BUTTON_SCROLL_FWD;
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else if (old_wheel_value == wheel_tbl[1][wheel_value])
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btn = BUTTON_SCROLL_BACK;
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if (btn != BUTTON_NONE)
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{
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if (btn != wheel_repeat)
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{
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/* direction reversals nullify repeats */
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wheel_repeat = btn;
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repeat = 0;
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}
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if (btn != BUTTON_NONE)
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{
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/* generate repeats if quick enough */
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if (repeat > 0)
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{
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btn |= BUTTON_REPEAT;
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}
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repeat += 2;
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/* the wheel is more reliable if we don't send ever change,
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* every 4th is basically one "physical click" is 1 item in
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* the rockbox menus */
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if (queue_empty(&button_queue) && ++counter >= 4)
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{
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buttonlight_on();
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backlight_on();
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/* 1<<24 is rather arbitary, seems to work well */
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queue_post(&button_queue, btn, 1<<24);
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/* message posted - reset count */
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counter = 0;
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}
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}
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}
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}
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if (repeat > 0)
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repeat--;
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else
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repeat = 0;
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old_wheel_value = wheel_value;
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}
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#endif /* !defined(BOOTLOADER) && defined(SCROLLWHEEL) */
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bool button_hold(void)
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{
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return hold_button;
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}
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static int button_dbop(void)
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{
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int ret = 0;
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lcd_button_support();
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/* Wait for fifo to empty */
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while ((DBOP_STAT & (1<<10)) == 0);
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DBOP_CTRL |= (1<<19);
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DBOP_CTRL &= ~(1<<16); /* disable output */
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DBOP_TIMPOL_01 = 0xe167e167;
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DBOP_TIMPOL_23 = 0xe167006e;
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int loop = 0;
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do
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{
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asm volatile ("nop\n");
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loop++;
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} while(loop < 64);
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DBOP_CTRL |= (1<<15); /* start read */
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int temp;
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do
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{
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temp = DBOP_STAT;
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} while ((temp & (1<<16)) == 0); /* wait for valid data */
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_dbop_din = DBOP_DIN; /* now read */
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DBOP_TIMPOL_01 = 0x6e167;
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DBOP_TIMPOL_23 = 0xa167e06f;
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DBOP_CTRL |= (1<<16);
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DBOP_CTRL &= ~(1<<19);
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#if !defined(BOOTLOADER)
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hold_button = _dbop_din & (1<<12);
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if (hold_button)
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return BUTTON_NONE;
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#endif
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/* read power */
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if (_dbop_din & (1<<8))
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ret |= BUTTON_POWER;
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if(!(_dbop_din & (1<<15)))
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ret |= BUTTON_HOME;
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#if defined(HAVE_SCROLLWHEEL)
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clickwheel();
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#endif
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return ret;
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}
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/* for the debug menu */
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short button_dbop_data(void)
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{
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return _dbop_din;
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}
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static int button_gpio(void)
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{
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int btn = BUTTON_NONE;
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if(hold_button)
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return btn;
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/* set afsel, so that we can read our buttons */
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GPIOC_AFSEL &= ~(1<<2|1<<3|1<<4|1<<5|1<<6);
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/* set dir so we can read our buttons (but reset the C pins first) */
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GPIOB_DIR &= ~(1<<4);
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GPIOC_DIR |= (1<<2|1<<3|1<<4|1<<5|1<<6);
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GPIOC_PIN(2) = (1<<2);
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GPIOC_PIN(3) = (1<<3);
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GPIOC_PIN(4) = (1<<4);
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GPIOC_PIN(5) = (1<<5);
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GPIOC_PIN(6) = (1<<6);
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GPIOC_DIR &= ~(1<<2|1<<3|1<<4|1<<5|1<<6);
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/* small delay needed to read buttons correctly */
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int delay = 50;
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while(delay >0) delay--;
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/* direct GPIO connections */
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if (!GPIOC_PIN(3))
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btn |= BUTTON_LEFT;
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if (!GPIOC_PIN(2))
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btn |= BUTTON_UP;
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if (!GPIOC_PIN(6))
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btn |= BUTTON_DOWN;
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if (!GPIOC_PIN(5))
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btn |= BUTTON_RIGHT;
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if (!GPIOC_PIN(4))
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btn |= BUTTON_SELECT;
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/* return to settings needed for lcd */
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GPIOC_DIR |= (1<<2|1<<3|1<<4|1<<5|1<<6);
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GPIOC_AFSEL |= (1<<2|1<<3|1<<4|1<<5|1<<6);
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return btn;
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}
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/*
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* Get button pressed from hardware
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*/
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int button_read_device(void)
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{
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int ret = BUTTON_NONE;
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ret |= button_dbop();
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ret |= button_gpio();
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#ifndef BOOTLOADER
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/* light handling */
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if (hold_button != hold_button_old)
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{
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hold_button_old = hold_button;
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backlight_hold_changed(hold_button);
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}
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#endif /* BOOTLOADER */
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return ret;
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}
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